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1 <?php
2 /**
3  * Customize API: WP_Customize_Nav_Menu_Setting class
4  *
5  * @package WordPress
6  * @subpackage Customize
7  * @since 4.4.0
8  */
9
10 /**
11  * Customize Setting to represent a nav_menu.
12  *
13  * Subclass of WP_Customize_Setting to represent a nav_menu taxonomy term, and
14  * the IDs for the nav_menu_items associated with the nav menu.
15  *
16  * @since 4.3.0
17  *
18  * @see wp_get_nav_menu_object()
19  * @see WP_Customize_Setting
20  */
21 class WP_Customize_Nav_Menu_Setting extends WP_Customize_Setting {
22
23         const ID_PATTERN = '/^nav_menu\[(?P<id>-?\d+)\]$/';
24
25         const TAXONOMY = 'nav_menu';
26
27         const TYPE = 'nav_menu';
28
29         /**
30          * Setting type.
31          *
32          * @since 4.3.0
33          * @access public
34          * @var string
35          */
36         public $type = self::TYPE;
37
38         /**
39          * Default setting value.
40          *
41          * @since 4.3.0
42          * @access public
43          * @var array
44          *
45          * @see wp_get_nav_menu_object()
46          */
47         public $default = array(
48                 'name'        => '',
49                 'description' => '',
50                 'parent'      => 0,
51                 'auto_add'    => false,
52         );
53
54         /**
55          * Default transport.
56          *
57          * @since 4.3.0
58          * @access public
59          * @var string
60          */
61         public $transport = 'postMessage';
62
63         /**
64          * The term ID represented by this setting instance.
65          *
66          * A negative value represents a placeholder ID for a new menu not yet saved.
67          *
68          * @since 4.3.0
69          * @access public
70          * @var int
71          */
72         public $term_id;
73
74         /**
75          * Previous (placeholder) term ID used before creating a new menu.
76          *
77          * This value will be exported to JS via the {@see 'customize_save_response'} filter
78          * so that JavaScript can update the settings to refer to the newly-assigned
79          * term ID. This value is always negative to indicate it does not refer to
80          * a real term.
81          *
82          * @since 4.3.0
83          * @access public
84          * @var int
85          *
86          * @see WP_Customize_Nav_Menu_Setting::update()
87          * @see WP_Customize_Nav_Menu_Setting::amend_customize_save_response()
88          */
89         public $previous_term_id;
90
91         /**
92          * Whether or not update() was called.
93          *
94          * @since 4.3.0
95          * @access protected
96          * @var bool
97          */
98         protected $is_updated = false;
99
100         /**
101          * Status for calling the update method, used in customize_save_response filter.
102          *
103          * See {@see 'customize_save_response'}.
104          *
105          * When status is inserted, the placeholder term ID is stored in `$previous_term_id`.
106          * When status is error, the error is stored in `$update_error`.
107          *
108          * @since 4.3.0
109          * @access public
110          * @var string updated|inserted|deleted|error
111          *
112          * @see WP_Customize_Nav_Menu_Setting::update()
113          * @see WP_Customize_Nav_Menu_Setting::amend_customize_save_response()
114          */
115         public $update_status;
116
117         /**
118          * Any error object returned by wp_update_nav_menu_object() when setting is updated.
119          *
120          * @since 4.3.0
121          * @access public
122          * @var WP_Error
123          *
124          * @see WP_Customize_Nav_Menu_Setting::update()
125          * @see WP_Customize_Nav_Menu_Setting::amend_customize_save_response()
126          */
127         public $update_error;
128
129         /**
130          * Constructor.
131          *
132          * Any supplied $args override class property defaults.
133          *
134          * @since 4.3.0
135          * @access public
136          *
137          * @param WP_Customize_Manager $manager Bootstrap Customizer instance.
138          * @param string               $id      An specific ID of the setting. Can be a
139          *                                      theme mod or option name.
140          * @param array                $args    Optional. Setting arguments.
141          *
142          * @throws Exception If $id is not valid for this setting type.
143          */
144         public function __construct( WP_Customize_Manager $manager, $id, array $args = array() ) {
145                 if ( empty( $manager->nav_menus ) ) {
146                         throw new Exception( 'Expected WP_Customize_Manager::$nav_menus to be set.' );
147                 }
148
149                 if ( ! preg_match( self::ID_PATTERN, $id, $matches ) ) {
150                         throw new Exception( "Illegal widget setting ID: $id" );
151                 }
152
153                 $this->term_id = intval( $matches['id'] );
154
155                 parent::__construct( $manager, $id, $args );
156         }
157
158         /**
159          * Get the instance data for a given widget setting.
160          *
161          * @since 4.3.0
162          * @access public
163          *
164          * @see wp_get_nav_menu_object()
165          *
166          * @return array Instance data.
167          */
168         public function value() {
169                 if ( $this->is_previewed && $this->_previewed_blog_id === get_current_blog_id() ) {
170                         $undefined  = new stdClass(); // Symbol.
171                         $post_value = $this->post_value( $undefined );
172
173                         if ( $undefined === $post_value ) {
174                                 $value = $this->_original_value;
175                         } else {
176                                 $value = $post_value;
177                         }
178                 } else {
179                         $value = false;
180
181                         // Note that a term_id of less than one indicates a nav_menu not yet inserted.
182                         if ( $this->term_id > 0 ) {
183                                 $term = wp_get_nav_menu_object( $this->term_id );
184
185                                 if ( $term ) {
186                                         $value = wp_array_slice_assoc( (array) $term, array_keys( $this->default ) );
187
188                                         $nav_menu_options  = (array) get_option( 'nav_menu_options', array() );
189                                         $value['auto_add'] = false;
190
191                                         if ( isset( $nav_menu_options['auto_add'] ) && is_array( $nav_menu_options['auto_add'] ) ) {
192                                                 $value['auto_add'] = in_array( $term->term_id, $nav_menu_options['auto_add'] );
193                                         }
194                                 }
195                         }
196
197                         if ( ! is_array( $value ) ) {
198                                 $value = $this->default;
199                         }
200                 }
201                 return $value;
202         }
203
204         /**
205          * Handle previewing the setting.
206          *
207          * @since 4.3.0
208          * @since 4.4.0 Added boolean return value
209          * @access public
210          *
211          * @see WP_Customize_Manager::post_value()
212          *
213          * @return bool False if method short-circuited due to no-op.
214          */
215         public function preview() {
216                 if ( $this->is_previewed ) {
217                         return false;
218                 }
219
220                 $undefined = new stdClass();
221                 $is_placeholder = ( $this->term_id < 0 );
222                 $is_dirty = ( $undefined !== $this->post_value( $undefined ) );
223                 if ( ! $is_placeholder && ! $is_dirty ) {
224                         return false;
225                 }
226
227                 $this->is_previewed       = true;
228                 $this->_original_value    = $this->value();
229                 $this->_previewed_blog_id = get_current_blog_id();
230
231                 add_filter( 'wp_get_nav_menus', array( $this, 'filter_wp_get_nav_menus' ), 10, 2 );
232                 add_filter( 'wp_get_nav_menu_object', array( $this, 'filter_wp_get_nav_menu_object' ), 10, 2 );
233                 add_filter( 'default_option_nav_menu_options', array( $this, 'filter_nav_menu_options' ) );
234                 add_filter( 'option_nav_menu_options', array( $this, 'filter_nav_menu_options' ) );
235
236                 return true;
237         }
238
239         /**
240          * Filters the wp_get_nav_menus() result to ensure the inserted menu object is included, and the deleted one is removed.
241          *
242          * @since 4.3.0
243          * @access public
244          *
245          * @see wp_get_nav_menus()
246          *
247          * @param array $menus An array of menu objects.
248          * @param array $args  An array of arguments used to retrieve menu objects.
249          * @return array
250          */
251         public function filter_wp_get_nav_menus( $menus, $args ) {
252                 if ( get_current_blog_id() !== $this->_previewed_blog_id ) {
253                         return $menus;
254                 }
255
256                 $setting_value = $this->value();
257                 $is_delete = ( false === $setting_value );
258                 $index = -1;
259
260                 // Find the existing menu item's position in the list.
261                 foreach ( $menus as $i => $menu ) {
262                         if ( (int) $this->term_id === (int) $menu->term_id || (int) $this->previous_term_id === (int) $menu->term_id ) {
263                                 $index = $i;
264                                 break;
265                         }
266                 }
267
268                 if ( $is_delete ) {
269                         // Handle deleted menu by removing it from the list.
270                         if ( -1 !== $index ) {
271                                 array_splice( $menus, $index, 1 );
272                         }
273                 } else {
274                         // Handle menus being updated or inserted.
275                         $menu_obj = (object) array_merge( array(
276                                 'term_id'          => $this->term_id,
277                                 'term_taxonomy_id' => $this->term_id,
278                                 'slug'             => sanitize_title( $setting_value['name'] ),
279                                 'count'            => 0,
280                                 'term_group'       => 0,
281                                 'taxonomy'         => self::TAXONOMY,
282                                 'filter'           => 'raw',
283                         ), $setting_value );
284
285                         array_splice( $menus, $index, ( -1 === $index ? 0 : 1 ), array( $menu_obj ) );
286                 }
287
288                 // Make sure the menu objects get re-sorted after an update/insert.
289                 if ( ! $is_delete && ! empty( $args['orderby'] ) ) {
290                         $this->_current_menus_sort_orderby = $args['orderby'];
291                         usort( $menus, array( $this, '_sort_menus_by_orderby' ) );
292                 }
293                 // @todo add support for $args['hide_empty'] === true
294
295                 return $menus;
296         }
297
298         /**
299          * Temporary non-closure passing of orderby value to function.
300          *
301          * @since 4.3.0
302          * @access protected
303          * @var string
304          *
305          * @see WP_Customize_Nav_Menu_Setting::filter_wp_get_nav_menus()
306          * @see WP_Customize_Nav_Menu_Setting::_sort_menus_by_orderby()
307          */
308         protected $_current_menus_sort_orderby;
309
310         /**
311          * Sort menu objects by the class-supplied orderby property.
312          *
313          * This is a workaround for a lack of closures.
314          *
315          * @since 4.3.0
316          * @access protected
317          * @param object $menu1
318          * @param object $menu2
319          * @return int
320          *
321          * @see WP_Customize_Nav_Menu_Setting::filter_wp_get_nav_menus()
322          */
323         protected function _sort_menus_by_orderby( $menu1, $menu2 ) {
324                 $key = $this->_current_menus_sort_orderby;
325                 return strcmp( $menu1->$key, $menu2->$key );
326         }
327
328         /**
329          * Filters the wp_get_nav_menu_object() result to supply the previewed menu object.
330          *
331          * Requesting a nav_menu object by anything but ID is not supported.
332          *
333          * @since 4.3.0
334          * @access public
335          *
336          * @see wp_get_nav_menu_object()
337          *
338          * @param object|null $menu_obj Object returned by wp_get_nav_menu_object().
339          * @param string      $menu_id  ID of the nav_menu term. Requests by slug or name will be ignored.
340          * @return object|null
341          */
342         public function filter_wp_get_nav_menu_object( $menu_obj, $menu_id ) {
343                 $ok = (
344                         get_current_blog_id() === $this->_previewed_blog_id
345                         &&
346                         is_int( $menu_id )
347                         &&
348                         $menu_id === $this->term_id
349                 );
350                 if ( ! $ok ) {
351                         return $menu_obj;
352                 }
353
354                 $setting_value = $this->value();
355
356                 // Handle deleted menus.
357                 if ( false === $setting_value ) {
358                         return false;
359                 }
360
361                 // Handle sanitization failure by preventing short-circuiting.
362                 if ( null === $setting_value ) {
363                         return $menu_obj;
364                 }
365
366                 $menu_obj = (object) array_merge( array(
367                                 'term_id'          => $this->term_id,
368                                 'term_taxonomy_id' => $this->term_id,
369                                 'slug'             => sanitize_title( $setting_value['name'] ),
370                                 'count'            => 0,
371                                 'term_group'       => 0,
372                                 'taxonomy'         => self::TAXONOMY,
373                                 'filter'           => 'raw',
374                         ), $setting_value );
375
376                 return $menu_obj;
377         }
378
379         /**
380          * Filters the nav_menu_options option to include this menu's auto_add preference.
381          *
382          * @since 4.3.0
383          * @access public
384          *
385          * @param array $nav_menu_options Nav menu options including auto_add.
386          * @return array (Kaybe) modified nav menu options.
387          */
388         public function filter_nav_menu_options( $nav_menu_options ) {
389                 if ( $this->_previewed_blog_id !== get_current_blog_id() ) {
390                         return $nav_menu_options;
391                 }
392
393                 $menu = $this->value();
394                 $nav_menu_options = $this->filter_nav_menu_options_value(
395                         $nav_menu_options,
396                         $this->term_id,
397                         false === $menu ? false : $menu['auto_add']
398                 );
399
400                 return $nav_menu_options;
401         }
402
403         /**
404          * Sanitize an input.
405          *
406          * Note that parent::sanitize() erroneously does wp_unslash() on $value, but
407          * we remove that in this override.
408          *
409          * @since 4.3.0
410          * @access public
411          *
412          * @param array $value The value to sanitize.
413          * @return array|false|null Null if an input isn't valid. False if it is marked for deletion.
414          *                          Otherwise the sanitized value.
415          */
416         public function sanitize( $value ) {
417                 // Menu is marked for deletion.
418                 if ( false === $value ) {
419                         return $value;
420                 }
421
422                 // Invalid.
423                 if ( ! is_array( $value ) ) {
424                         return null;
425                 }
426
427                 $default = array(
428                         'name'        => '',
429                         'description' => '',
430                         'parent'      => 0,
431                         'auto_add'    => false,
432                 );
433                 $value = array_merge( $default, $value );
434                 $value = wp_array_slice_assoc( $value, array_keys( $default ) );
435
436                 $value['name']        = trim( esc_html( $value['name'] ) ); // This sanitization code is used in wp-admin/nav-menus.php.
437                 $value['description'] = sanitize_text_field( $value['description'] );
438                 $value['parent']      = max( 0, intval( $value['parent'] ) );
439                 $value['auto_add']    = ! empty( $value['auto_add'] );
440
441                 if ( '' === $value['name'] ) {
442                         $value['name'] = _x( '(unnamed)', 'Missing menu name.' );
443                 }
444
445                 /** This filter is documented in wp-includes/class-wp-customize-setting.php */
446                 return apply_filters( "customize_sanitize_{$this->id}", $value, $this );
447         }
448
449         /**
450          * Storage for data to be sent back to client in customize_save_response filter.
451          *
452          * See {@see 'customize_save_response'}.
453          *
454          * @access protected
455          * @since 4.3.0
456          * @var array
457          *
458          * @see WP_Customize_Nav_Menu_Setting::amend_customize_save_response()
459          */
460         protected $_widget_nav_menu_updates = array();
461
462         /**
463          * Create/update the nav_menu term for this setting.
464          *
465          * Any created menus will have their assigned term IDs exported to the client
466          * via the {@see 'customize_save_response'} filter. Likewise, any errors will be exported
467          * to the client via the customize_save_response() filter.
468          *
469          * To delete a menu, the client can send false as the value.
470          *
471          * @since 4.3.0
472          * @access protected
473          *
474          * @see wp_update_nav_menu_object()
475          *
476          * @param array|false $value {
477          *     The value to update. Note that slug cannot be updated via wp_update_nav_menu_object().
478          *     If false, then the menu will be deleted entirely.
479          *
480          *     @type string $name        The name of the menu to save.
481          *     @type string $description The term description. Default empty string.
482          *     @type int    $parent      The id of the parent term. Default 0.
483          *     @type bool   $auto_add    Whether pages will auto_add to this menu. Default false.
484          * }
485          * @return null|void
486          */
487         protected function update( $value ) {
488                 if ( $this->is_updated ) {
489                         return;
490                 }
491
492                 $this->is_updated = true;
493                 $is_placeholder   = ( $this->term_id < 0 );
494                 $is_delete        = ( false === $value );
495
496                 add_filter( 'customize_save_response', array( $this, 'amend_customize_save_response' ) );
497
498                 $auto_add = null;
499                 if ( $is_delete ) {
500                         // If the current setting term is a placeholder, a delete request is a no-op.
501                         if ( $is_placeholder ) {
502                                 $this->update_status = 'deleted';
503                         } else {
504                                 $r = wp_delete_nav_menu( $this->term_id );
505
506                                 if ( is_wp_error( $r ) ) {
507                                         $this->update_status = 'error';
508                                         $this->update_error  = $r;
509                                 } else {
510                                         $this->update_status = 'deleted';
511                                         $auto_add = false;
512                                 }
513                         }
514                 } else {
515                         // Insert or update menu.
516                         $menu_data = wp_array_slice_assoc( $value, array( 'description', 'parent' ) );
517                         $menu_data['menu-name'] = $value['name'];
518
519                         $menu_id = $is_placeholder ? 0 : $this->term_id;
520                         $r = wp_update_nav_menu_object( $menu_id, wp_slash( $menu_data ) );
521                         $original_name = $menu_data['menu-name'];
522                         $name_conflict_suffix = 1;
523                         while ( is_wp_error( $r ) && 'menu_exists' === $r->get_error_code() ) {
524                                 $name_conflict_suffix += 1;
525                                 /* translators: 1: original menu name, 2: duplicate count */
526                                 $menu_data['menu-name'] = sprintf( __( '%1$s (%2$d)' ), $original_name, $name_conflict_suffix );
527                                 $r = wp_update_nav_menu_object( $menu_id, wp_slash( $menu_data ) );
528                         }
529
530                         if ( is_wp_error( $r ) ) {
531                                 $this->update_status = 'error';
532                                 $this->update_error  = $r;
533                         } else {
534                                 if ( $is_placeholder ) {
535                                         $this->previous_term_id = $this->term_id;
536                                         $this->term_id          = $r;
537                                         $this->update_status    = 'inserted';
538                                 } else {
539                                         $this->update_status = 'updated';
540                                 }
541
542                                 $auto_add = $value['auto_add'];
543                         }
544                 }
545
546                 if ( null !== $auto_add ) {
547                         $nav_menu_options = $this->filter_nav_menu_options_value(
548                                 (array) get_option( 'nav_menu_options', array() ),
549                                 $this->term_id,
550                                 $auto_add
551                         );
552                         update_option( 'nav_menu_options', $nav_menu_options );
553                 }
554
555                 if ( 'inserted' === $this->update_status ) {
556                         // Make sure that new menus assigned to nav menu locations use their new IDs.
557                         foreach ( $this->manager->settings() as $setting ) {
558                                 if ( ! preg_match( '/^nav_menu_locations\[/', $setting->id ) ) {
559                                         continue;
560                                 }
561
562                                 $post_value = $setting->post_value( null );
563                                 if ( ! is_null( $post_value ) && $this->previous_term_id === intval( $post_value ) ) {
564                                         $this->manager->set_post_value( $setting->id, $this->term_id );
565                                         $setting->save();
566                                 }
567                         }
568
569                         // Make sure that any nav_menu widgets referencing the placeholder nav menu get updated and sent back to client.
570                         foreach ( array_keys( $this->manager->unsanitized_post_values() ) as $setting_id ) {
571                                 $nav_menu_widget_setting = $this->manager->get_setting( $setting_id );
572                                 if ( ! $nav_menu_widget_setting || ! preg_match( '/^widget_nav_menu\[/', $nav_menu_widget_setting->id ) ) {
573                                         continue;
574                                 }
575
576                                 $widget_instance = $nav_menu_widget_setting->post_value(); // Note that this calls WP_Customize_Widgets::sanitize_widget_instance().
577                                 if ( empty( $widget_instance['nav_menu'] ) || intval( $widget_instance['nav_menu'] ) !== $this->previous_term_id ) {
578                                         continue;
579                                 }
580
581                                 $widget_instance['nav_menu'] = $this->term_id;
582                                 $updated_widget_instance = $this->manager->widgets->sanitize_widget_js_instance( $widget_instance );
583                                 $this->manager->set_post_value( $nav_menu_widget_setting->id, $updated_widget_instance );
584                                 $nav_menu_widget_setting->save();
585
586                                 $this->_widget_nav_menu_updates[ $nav_menu_widget_setting->id ] = $updated_widget_instance;
587                         }
588                 }
589         }
590
591         /**
592          * Updates a nav_menu_options array.
593          *
594          * @since 4.3.0
595          * @access protected
596          *
597          * @see WP_Customize_Nav_Menu_Setting::filter_nav_menu_options()
598          * @see WP_Customize_Nav_Menu_Setting::update()
599          *
600          * @param array $nav_menu_options Array as returned by get_option( 'nav_menu_options' ).
601          * @param int   $menu_id          The term ID for the given menu.
602          * @param bool  $auto_add         Whether to auto-add or not.
603          * @return array (Maybe) modified nav_menu_otions array.
604          */
605         protected function filter_nav_menu_options_value( $nav_menu_options, $menu_id, $auto_add ) {
606                 $nav_menu_options = (array) $nav_menu_options;
607                 if ( ! isset( $nav_menu_options['auto_add'] ) ) {
608                         $nav_menu_options['auto_add'] = array();
609                 }
610
611                 $i = array_search( $menu_id, $nav_menu_options['auto_add'] );
612                 if ( $auto_add && false === $i ) {
613                         array_push( $nav_menu_options['auto_add'], $this->term_id );
614                 } elseif ( ! $auto_add && false !== $i ) {
615                         array_splice( $nav_menu_options['auto_add'], $i, 1 );
616                 }
617
618                 return $nav_menu_options;
619         }
620
621         /**
622          * Export data for the JS client.
623          *
624          * @since 4.3.0
625          * @access public
626          *
627          * @see WP_Customize_Nav_Menu_Setting::update()
628          *
629          * @param array $data Additional information passed back to the 'saved' event on `wp.customize`.
630          * @return array Export data.
631          */
632         public function amend_customize_save_response( $data ) {
633                 if ( ! isset( $data['nav_menu_updates'] ) ) {
634                         $data['nav_menu_updates'] = array();
635                 }
636                 if ( ! isset( $data['widget_nav_menu_updates'] ) ) {
637                         $data['widget_nav_menu_updates'] = array();
638                 }
639
640                 $data['nav_menu_updates'][] = array(
641                         'term_id'          => $this->term_id,
642                         'previous_term_id' => $this->previous_term_id,
643                         'error'            => $this->update_error ? $this->update_error->get_error_code() : null,
644                         'status'           => $this->update_status,
645                         'saved_value'      => 'deleted' === $this->update_status ? null : $this->value(),
646                 );
647
648                 $data['widget_nav_menu_updates'] = array_merge(
649                         $data['widget_nav_menu_updates'],
650                         $this->_widget_nav_menu_updates
651                 );
652                 $this->_widget_nav_menu_updates = array();
653
654                 return $data;
655         }
656 }